| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2023-52559: iommu/vt-d: Avoid memory allocation in iommu_suspend() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| iommu/vt-d: Avoid memory allocation in iommu_suspend() |
| |
| The iommu_suspend() syscore suspend callback is invoked with IRQ disabled. |
| Allocating memory with the GFP_KERNEL flag may re-enable IRQs during |
| the suspend callback, which can cause intermittent suspend/hibernation |
| problems with the following kernel traces: |
| |
| Calling iommu_suspend+0x0/0x1d0 |
| ------------[ cut here ]------------ |
| WARNING: CPU: 0 PID: 15 at kernel/time/timekeeping.c:868 ktime_get+0x9b/0xb0 |
| ... |
| CPU: 0 PID: 15 Comm: rcu_preempt Tainted: G U E 6.3-intel #r1 |
| RIP: 0010:ktime_get+0x9b/0xb0 |
| ... |
| Call Trace: |
| <IRQ> |
| tick_sched_timer+0x22/0x90 |
| ? __pfx_tick_sched_timer+0x10/0x10 |
| __hrtimer_run_queues+0x111/0x2b0 |
| hrtimer_interrupt+0xfa/0x230 |
| __sysvec_apic_timer_interrupt+0x63/0x140 |
| sysvec_apic_timer_interrupt+0x7b/0xa0 |
| </IRQ> |
| <TASK> |
| asm_sysvec_apic_timer_interrupt+0x1f/0x30 |
| ... |
| ------------[ cut here ]------------ |
| Interrupts enabled after iommu_suspend+0x0/0x1d0 |
| WARNING: CPU: 0 PID: 27420 at drivers/base/syscore.c:68 syscore_suspend+0x147/0x270 |
| CPU: 0 PID: 27420 Comm: rtcwake Tainted: G U W E 6.3-intel #r1 |
| RIP: 0010:syscore_suspend+0x147/0x270 |
| ... |
| Call Trace: |
| <TASK> |
| hibernation_snapshot+0x25b/0x670 |
| hibernate+0xcd/0x390 |
| state_store+0xcf/0xe0 |
| kobj_attr_store+0x13/0x30 |
| sysfs_kf_write+0x3f/0x50 |
| kernfs_fop_write_iter+0x128/0x200 |
| vfs_write+0x1fd/0x3c0 |
| ksys_write+0x6f/0xf0 |
| __x64_sys_write+0x1d/0x30 |
| do_syscall_64+0x3b/0x90 |
| entry_SYSCALL_64_after_hwframe+0x72/0xdc |
| |
| Given that only 4 words memory is needed, avoid the memory allocation in |
| iommu_suspend(). |
| |
| The Linux kernel CVE team has assigned CVE-2023-52559 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.11 with commit 33e07157105e472b746b70b3ed4197c57c43ab68 and fixed in 5.15.136 with commit 29298c85a81abdc512e87537515ed4b1a9601d0e |
| Issue introduced in 5.11 with commit 33e07157105e472b746b70b3ed4197c57c43ab68 and fixed in 6.1.57 with commit c12ef025add77ca3a0902e8719d552b6d47b4282 |
| Issue introduced in 5.11 with commit 33e07157105e472b746b70b3ed4197c57c43ab68 and fixed in 6.5.7 with commit 496c591f0b389eb782f36d9d4c2564b9a865eed0 |
| Issue introduced in 5.11 with commit 33e07157105e472b746b70b3ed4197c57c43ab68 and fixed in 6.6 with commit 59df44bfb0ca4c3ee1f1c3c5d0ee8e314844799e |
| |
| Please see https://www.kernel.org for a full list of currently supported |
| kernel versions by the kernel community. |
| |
| Unaffected versions might change over time as fixes are backported to |
| older supported kernel versions. The official CVE entry at |
| https://cve.org/CVERecord/?id=CVE-2023-52559 |
| will be updated if fixes are backported, please check that for the most |
| up to date information about this issue. |
| |
| |
| Affected files |
| ============== |
| |
| The file(s) affected by this issue are: |
| drivers/iommu/intel/iommu.c |
| drivers/iommu/intel/iommu.h |
| |
| |
| Mitigation |
| ========== |
| |
| The Linux kernel CVE team recommends that you update to the latest |
| stable kernel version for this, and many other bugfixes. Individual |
| changes are never tested alone, but rather are part of a larger kernel |
| release. Cherry-picking individual commits is not recommended or |
| supported by the Linux kernel community at all. If however, updating to |
| the latest release is impossible, the individual changes to resolve this |
| issue can be found at these commits: |
| https://git.kernel.org/stable/c/29298c85a81abdc512e87537515ed4b1a9601d0e |
| https://git.kernel.org/stable/c/c12ef025add77ca3a0902e8719d552b6d47b4282 |
| https://git.kernel.org/stable/c/496c591f0b389eb782f36d9d4c2564b9a865eed0 |
| https://git.kernel.org/stable/c/59df44bfb0ca4c3ee1f1c3c5d0ee8e314844799e |
